Equations and Chapter I review
Answers are for parents and teachers.
1
Solve x + 3 718 = 5 904.
2186
2
Solve y − 527 = 2 846.
3373
3
Solve 91 − z = 27 and check the root.
64
4
Problem: a box had 180 tangerines; after some were sold 76 were left. How many were sold? Solve by writing an equation.
104
5
Make two inverse problems for the problem above (a different quantity unknown in each).
For example: “76 left, 104 sold: how many at first?” (180) and “180 at first, 104 sold: how many left?” (76).